Muscle strength evaluations after ACL reconstruction

Int J Sports Med. 2007 Oct;28(10):868-72. doi: 10.1055/s-2007-964912. Epub 2007 Mar 15.


The quadriceps and hamstring muscle strengths of 16 patients operated using a bone-patellar tendon-bone (BTB) autograft and 32 patients operated using a quadruple hamstring autograft for an arthroscopic anterior cruciate ligament (ACL) reconstruction were analyzed 4- to 7-years postoperatively. Standardized isokinetic testing, a clinical evaluation and instrumented assessment of knee laxity were done. The findings showed no significant strength deficits between the patients in the BTB and Hamstring groups and the deficits were, in general, small. The quadriceps and hamstring muscle strengths were better in patients with a longer than shorter follow-up and stable knees had less knee flexion torque deficit than unstable knees. Strength deficit was associated with lower Lysholm knee scores. The findings of this study showed that the muscle strengths of the operated limb had a positive association with the functional outcome of the knee in the long-term and support the use of active rehabilitation after ACL reconstruction.

MeSH terms

  • Adult
  • Anterior Cruciate Ligament / surgery*
  • Anterior Cruciate Ligament Injuries
  • Arthroscopy
  • Female
  • Finland
  • Humans
  • Male
  • Muscle Strength / physiology*
  • Outcome Assessment, Health Care / methods
  • Quadriceps Muscle / physiology
  • Reconstructive Surgical Procedures*
  • Retrospective Studies
  • Thigh / physiology